2 . the effects of various access methods of ieee 802 . 11b are investigated in detail and the related mechanisms are discussed , especially , the basic access method and the rts / cts method are compared with in theory and with opnet 2 .详细研究了ieee802 . 11b的访问控制方式,对dcf的基本访问方式和rts / cts访问方式进行了比较,通过理论分析和仿真实验验证体现了在实际网络中rts / cts方式的优越性。